US3679241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compression pipe coupling
Assignee: Schmidt Kranz and Co GmbH
•
Filing: 1970-06-03
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Granted: 1972-07-25
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Expires: 1990-06-03
Abstract
Abstract A compression type pipe coupling for connecting unthreaded pipes together or to a threaded pipe. A female threaded body has an annular collar upon which the end of the pipe rests, the pipe being held in place by an elastic plastic sealing ring, a frustoconical washer and a male threaded sleeve which compresses the ring and washer.
Inventors
- 👤 Ernst Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:00
CPC Classifications
F; F16; F16L; F16L19/00; F16L19/08; F16L19/10; F16L19/12; F16L19/06; F16L19/075; F16L19/083; F16L19/086
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
224 words
A pipe coupling sleeve having a housing with at least two connecting ends at least one end adapted to clampingly engage an unthreaded smooth pipe including means for sealing and clamping said pipe comprising: a. female threads in said housing; b. a pressure sleeve having an interior bore to receive said pipe and male threads complementary to said female threads; c. an annular stop surface within said housing to limit the axial penetration of said pipe into said housing; d. an annular space within the housing between the pressure sleeve and the stop surface, said space containing: 1. at least one elastic plastic sealing ring; 2. a clamping cap which is resistant to elastic deformation having an inwardly directed conical end which is slit to form a plurality of projections; 3. an inner cone; and a frustoconical shaped thin-walled deformable disc positioned at each end of the sealing ring, the width of the annular surface of each of said discs being somewhat greater than the radial width of said housing annular space e. said ring, cap discs and cone being arranged with said space so that when the pressure sleeve is screwed into the housing the sealing ring and discs will deform to clamp said pipe and the projections of the cap will be deformed by the cone to engage a pipe inserted therein.
Claim 2
Dependent Claim
224 words
A pipe coupling sleeve having a housing with at least two connecting ends at least one end adapted to clampingly engage an unthreaded smooth pipe including means for sealing and clamping said pipe comprising: a. female threads in said housing; b. a pressure sleeve having an interior bore to receive said pipe and male threads complementary to said female threads; c. an annular stop surface within said housing to limit the axial penetration of said pipe into said housing; d. an annular space within the housing between the pressure sleeve and the stop surface, said space containing: 1. at least one elastic plastic sealing ring; 2. a clamping cap which is resistant to elastic deformation having an inwardly directed conical end which is slit to form a plurality of projections; 3. an inner cone; and a frustoconical shaped thin-walled deformable disc positioned at each end of the sealing ring, the width of the annular surface of each of said discs being somewhat greater than the radial width of said housing annular space e. said ring, cap discs and cone being arranged with said space so that when the pressure sleeve is screwed into the housing the sealing ring and discs will deform to clamp said pipe and the projections of the cap will be deformed by the cone to engage a pipe inserted therein.
Claim 3
Dependent Claim
51 words
at least two clamping caps which are resistant to elastic deformation, each cap having an inwardly directed conical end which is slit to form a plurality of projections and a pressure ring between said caps, said pressure ring having an inner cone surface receiving said projections of one of said caps;
Claim 4
Dependent Claim
51 words
at least two clamping caps which are resistant to elastic deformation, each cap having an inwardly directed conical end which is slit to form a plurality of projections and a pressure ring between said caps, said pressure ring having an inner cone surface receiving said projections of one of said caps;
Claim 5
Dependent Claim
24 words
a clamping cap which is resistant to elastic deformation having an inwardly directed conical end which is slit to form a plurality of projections;
Claim 6
Dependent Claim
24 words
a clamping cap which is resistant to elastic deformation having an inwardly directed conical end which is slit to form a plurality of projections;
Claim 7
Dependent Claim
27 words
The coupling of claim 1 in which one of the frustoconical discs is arranged between the sealing ring and a pressure ring having an approximately trapezoidal cross-section.
Claim 8
Dependent Claim
93 words
an inner cone; and a frustoconical shaped thin-walled deformable disc positioned at each end of the sealing ring, the width of the annular surface of each of said discs being somewhat greater than the radial width of said housing annular space e. said ring, cap discs and cone being arranged with said space so that when the pressure sleeve is screwed into the housing the sealing ring and discs will deform to clamp said pipe and the projections of the cap will be deformed by the cone to engage a pipe inserted therein.
Claim 9
Dependent Claim
93 words
an inner cone; and a frustoconical shaped thin-walled deformable disc positioned at each end of the sealing ring, the width of the annular surface of each of said discs being somewhat greater than the radial width of said housing annular space e. said ring, cap discs and cone being arranged with said space so that when the pressure sleeve is screwed into the housing the sealing ring and discs will deform to clamp said pipe and the projections of the cap will be deformed by the cone to engage a pipe inserted therein.
Claim 10
Dependent Claim
60 words
an inner cone; e. said sealing ring, caps pressure ring and cone being arranged with said space so that when the pressure sleeve is screwed into the housing the sealing ring will deform to clamp said pipe and the projections of the caps will be deformed by the cone and pressure ring cone surface to engage a pipe inserted therein.
Claim 11
Dependent Claim
60 words
an inner cone; e. said sealing ring, caps pressure ring and cone being arranged with said space so that when the pressure sleeve is screwed into the housing the sealing ring will deform to clamp said pipe and the projections of the caps will be deformed by the cone and pressure ring cone surface to engage a pipe inserted therein.
Claim 12
Dependent Claim
28 words
The coupling of claim 2 in which the other frustoconical disc is clamped between the end of the sealing ring and a pressure ring of approximately square profile.
Claim 13
Dependent Claim
61 words
The coupling of claim 1 in which the frustoconical discs are deformable in such a manner that upon screwing in of the pressure sleeve and the inward pushing of the clamping cap, they are pressed into an L-shape against the ends of the sealing ring and against the cylindrical wall surfaces of pipe and housing so as to form a seal.
Claim 14
Dependent Claim
97 words
A pipe coupling sleeve having a housing with at least two connecting ends at least one end adapted to clampingly engage an unthreaded smooth pipe including means for sealing and clamping said pipe comprising: a. female threads in said housing; b. a pressure sleeve having an interior bore to receive said pipe and male threads complementary to said female threads; c. an annular stop surface within said housing to limit the axial penetration of said pipe into said housing; d. an annular space within the housing between the pressure sleeve and the stop surface, said space containing:
Claim 15
Dependent Claim
97 words
A pipe coupling sleeve having a housing with at least two connecting ends at least one end adapted to clampingly engage an unthreaded smooth pipe including means for sealing and clamping said pipe comprising: a. female threads in said housing; b. a pressure sleeve having an interior bore to receive said pipe and male threads complementary to said female threads; c. an annular stop surface within said housing to limit the axial penetration of said pipe into said housing; d. an annular space within the housing between the pressure sleeve and the stop surface, said space containing:
Claim 16
Dependent Claim
26 words
The coupling of claim 5 in which the clamping cap nearer to the pressure sleeve has a greater resistance to deformation than the other clamping cap.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |